CSET(3C) Standard C Library Functions CSET(3C)

NAME

cset, csetlen, csetcol, csetno, wcsetno - get information on EUC codesets

SYNOPSIS

#include <euc.h>

int csetlen(int codeset);


int csetcol(int codeset);


int csetno(unsigned char c);


#include <widec.h>

int wcsetno(wchar_t pc);

DESCRIPTION

Both csetlen() and csetcol() take a code set number codeset, which must
be 0, 1, 2, or 3. The csetlen() function returns the number of bytes
needed to represent a character of the given Extended Unix Code (EUC)
code set, excluding the single-shift characters SS2 and SS3 for codesets
2 and 3. The csetcol() function returns the number of columns a character
in the given EUC code set would take on the display.


The csetno() function is implemented as a macro that returns a codeset
number (0, 1, 2, or 3) for the EUC character whose first byte is c. For
example,

#include <euc.h>
...
x+=csetcol(csetno(c));


increments a counter "x" (such as the cursor position) by the width of
the character whose first byte is c.


The wcsetno() function is implemented as a macro that returns a codeset
number (0, 1, 2, or 3) for the given process code character pc. For
example,

#include <euc.h>
#include <widec.h>
...
x+=csetcol(wcsetno(pc));


increments a counter "x" (such as the cursor position) by the width of
the Process Code character pc.

USAGE

These functions work only for the EUC locales.


The cset(), csetlen(), csetcol(), csetno(), and wcsetno() functions can
be used safely in multithreaded applications, as long as setlocale(3C) is
not being called to change the locale.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+---------------+-------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-------------------------+
|MT-Level | MT-Safe with exceptions |
+---------------+-------------------------+

SEE ALSO

euclen(3C), setlocale(3C), attributes(7)


June 18, 2021 CSET(3C)